Damper-regulator.



- PATENTED JULY 21, 1908.

w. P. DENNIS. DAMPER REGULATOR.

APPLICATION FILED AUG. 30. 1907.

3 SHEETS-SHEET 1 IN vmv TOR.

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WITNESSES:

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PATENTED JULY 21, 1908.

W. P. DENNIS.

DAMPER REGULATOR.

- .APPLIGATION FILED AUG. 30. 1907.

3 SHEETS-SHEET 2.

INVENTOR.

LU'L LL'LcLm Ff Dcma'w.

WITNESSES.

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PATENTED JULY 21, 1908.

W. P. DENNIS.

DAMPER REGULATOR. APPLVIOATION FILED AUG. 30, 1907.

3 SHEETS-SHEET 3.

INVENTOR.

William P Dennis I FAQ'S WITNESSES" LBW/\fi. zw

UNITED STATES PATENT OFFICE.

WILLIAM P. DENNIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAMEWERS,

- OF PHILADELPHIA, PENNSYLVANIA.

DAMPER-REGULATOR.

Specification of Letters Patent.

, Patented July 21, 1908.

To all whom it may concern:

Be it known that I, WILLIAM P. DENNIS, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inDamper- Regulators, of which the following is a specification.

This invention relates to improvements in damper regulators andparticularly to that class controlled directly or indirectly by thefluctuations of steam pressure in the boilers whose furnace stack draftis to be regulated.

The objects of the improvement are, first, to provide an apparatus thatshall be instantly responsive in action to a-change in steam pressure insuch boilers, in correcting either an excess or deficiency, if withinits scope, thus maintaining uniformity of pressure. Second, to providesuch devices as are not readily disarranged but durable and efficient incharacter and in which the operative arts are easily accessible withoutdismountapparatus, including the pipe connections.

Fig. 2, is a plan view of the same. Fig. 3. 1s a front elevation of thecontrolling valve.

Fig. 4,is a longitudinal section of Fig. 3 showing the controlling valveadmitting fluid to operate the damper in one direction. Fig. 5, is asimilar view showing the controlling valve in an opposite position. Fig.6, is a side elevation of the actuating mechanism, partially in section,showing the valve and piston construction. Fig. 7, is a partial frontview of the piston valve stem attachment. Fig. 8, is a cross section ofthe controlling valve taken on line a-c, of Fig. 6. Fig. 9, is a crosssection taken on line bb, of Fig. 8. Fig. 10,is a detail of the pistonvalve. Fig. -11, is a cross section of the same, taken on line cc, ofFig. 10, and, Fi 12, is a partial rear end view of the contro lingvalve.

The apparatus comprises a plate 1, adapted to be secured by bracketsnotshown to a wall or other substantial support, conveniently located withreference to the boiler and stack. On the upper face and near oneend oftheplate is a valve chamber 2, having the domed cover 3, and ,adiaphragm 4, secured between the flanges of the valve chamber and itscover, which are bolt-- ed as indicated. The space below the diahragm 4,and also the connecting p pe A eading-to the boilers, is filled with aliquid, as water, to about the height of the union A so that the steampressure of the boilers may be directly exerted on the diaphragm whenthe valve A, is open but the heat therein prevented from transmission toand hence injuring the material of which the diaphragm is made.

Passing through the top of the cover 3a nd maintained vertically by aproper bearing formed therein, is the plunger 5, connected at the lowerend to the diaphragm andin such manner as to be operated by 1t. Thecover 3, has an integral upwardly projeotmg outer rib with anoverhanging end 3, slotted to receive the end of the beam 6, in therecess thus formed and is provided with a seat in its'lower edgesfor-the angular knife-edge,

ivot bearing ,6, set in the beam. This bar is further provided withanother similar bearing 6, attached to the beam in a reversed position,in register and to engage with the plunger 5, so that any lateral motionthereof is communicated directly to the beam 6, held down .by the pullof the weights 7,.depending from the outerend of the said beam. Asliding counter weight 8, 1s also adjustably connected'to the beam,between the endent weights and the beam guide 9. his latter comprises astandard, secured cess for the passage of the beam, and screws 9 and 9",limiting the movement of the beam up and down respectively; a hand screw10, set in a projection of the standard, provides-means for locking thebeamagamst an movement if desirable.

The damper.not shown-is intended to to the plate 1, having a slottedrebe connected with the end of the lever 11,

sage

' stroke, contacting with the inwardly projecting hub of the cap 16. Atthe other end of the stroke similar provision is made against excessmovement by allowing the hub of the lower disk 17 to strike against theinner end of the stuffing box 15.

The cylinder 18, has an annular flange 18 midway of its length, adaptedto be detachably secured to the plate 1; and it is further provided withports 19 and 20 for the admission of the actuating medium either aboveor below the piston 17, operating the same thereby.

Water, compressed-air, steam or other fluid under pressure is admittedfrom the pipe B, to the cylinder 18, through the valve casing 21, bymeans of the piston'valve' 22,

" which passes upwardly through the stuffing box 23, and is attached atits upper end to a pivoted connecting member 24, having a means ofadjustment at 25, and detachably pivoted to the beam 6, but at one sidethereof and not directly underneath, thereby affording means forconveniently disconnecting without disturbing the beam.

A single inlet 30, formed transversely to the valve and two outletpassages 31 and 32, communicating directly with the ports 19 and 20, areformed respectively above and below theinlet 30 and in the same verticalplane but so that either or both may be closed from communicating with.it by the piston valve 22, which intersects with the ends of all theseopenings.

In one side of the body is formed a bypass 33, having its upper terminuswithin the ore of the'valve 22, at right angles to the other passagesand slightly above the upper outlet 31.- Its lower end opens within therecess at the bottom of the valve body. 7

The piston valve 22, is of solid cylindrical construction, having tworeduced diametrical ,ortions 31 and 32, providing a pasetween the inlet30 and outlets 31. and 32, as the valve is moved up ordown. When thevalve is raised a passage is opened be tween the inlet 30 and outlet 31,around the reduced portion, admitting a currentof fluid,

while at the same time, the outlet 32 is open to exhaust from. thecylinder through the bottom. port of the valve body. When the valve isdown a similar assage-way is made between the inlet 30 and outlet 32,while exhaust from the cylinder takes place through the outlet 31,around the reduced area31, to

the by-pass'33, and then out at the bottom of the valve body. If thevalve be at a midposition obviously no passage of fluids can take place.I 1

In the reduced portions of the valve I provide transverse holes 22 inorder that the passage of fluids maybe as free and unrestricted asossibleand find the said holes result in a M more rapid and satisfactoryaction, besides which a more perfectly balanced valve is obtained.

The cylinder ports19 and 20, are formed in a projecting member 35,attached to the cylinder 18, and connected to the valve 21, by thecoupling or look nut 36 the face of the port containing me mb r35, isprovided with depressions immediately surrounding the ort openingsadapted to receive correspondmg projections onthe end of the valve body21., the said projections entering into the depressions in the portmember 35, and being maintained against rotary motion thereby, as inconnecting the valve body.

I have shown the connections as made with a right and left thread on thecontacting members and a correspondingly threaded nut, but obviously Imay use any form of a union preferable.

In operation, steam from the boiler being connected to pipes A, water topipe B,and the damper operatively attached to the lever 11, any excessof steam pressure in pipe A, raises the diaphragm and hence the beamtogether with its weights and the valve 22; whereupon fluid from thepiple B enters the valve body 21, passes throug the lower passage pastand partially through the opening 22, in the valve 22, and enters thecylinder .18 through the port 20, raising the valve 17,

through its rod 14, operating the lever, 11, in

draft.

Obviously, the several weights on the beam may be adjusted to meet anysteam pressure re uirements desirable and when so adjusted wi 1 actoperatively if their balance be overcome, as above described orreversely upon occasion.

I am aware that devices for such purposes have long been in use, hencedo not seek to cover the same broadly, but believe that devicespossessing the peculiar characteristics of my invention to -be new,

Therefore having described the same, what I claim and desire to secureby Letters Patenii is; d I

n a am or re ator a su ortin bracket havifig mo ii ted thereon h diaphragbm chamber having connections leading to a oiler, a diaphragmcontained therein and an upwardly projecting rod moved by said diap ragman arm pivoted and connected to the dia hragm. r'od'to bemoved thereby,said arm aving at its 11 per end a suspended series of welghts and asliding weight, a sup orting column attached to the other end 0? thebracket. having a 'slot through which the pivoted arm asses, and

adjustable screws forming stops or regulating the movement of sai arm, acylinder, a piston therein and piston rod, said rod being connected atits-lower end to a lever pivoted to the under side of the bracket andhaving connections to a damper, a regulating valve casing having twoports on one side connected to opposite ends of the piston cham ber,andan lnlet port located iametrically opposite to the outlet orts butbetween the same, the lower end 0 said valve casing being connected toan exhaust pipe, said casing having a by-pass connecting its upper endwith the exhaust passage, and a piston valve working in said valvecasing, the-upper end of which is connected to the diaphragm op eratedarm, saidpiston valve rovided with reduced areas so arranged t at. whenthe aust, and that when said. piston isthe by-pass with the exhaust,said piston at 7 its reduced ortions having transverse passages througit for the passage of fluid from the inlet to an outlet port.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM P. DENNIS. Witnesses I WARREN E. WILLIS, EUGENE V. CoooEY.

